<!DOCTYPE>
<html>
<head>
    <meta charset="UTF-8">
    <title>localStorage</title>
</head>
<body>
    <h2>localStorage</h2>
    <button onclick="saveData()">点我保存一个数据</button>
    <button onclick="readData()">点我读取一个数据</button>
    <button onclick="deleteData()">点我删除一个数据</button>
    <button onclick="deleteAllData()">点我清空数据</button>

    <script type="text/javascript">
        let p = {name:'zhangsan',age:18}

        function saveData(){
            localStorage.setItem('msg','123')
            localStorage.setItem('person', JSON.stringify(p))
        }
        function readData(){
            console.log(localStorage.getItem('msg'))
            const result = localStorage.getItem('person')
            console.log(JSON.parse(result))
        }
        function deleteData(){
            localStorage.removeItem('msg')
        }
        function deleteAllData(){
            localStorage.clear()
        }
    </script>
</body>
</html>